C#压缩文件

使用SharpZipLib插件   插件地址：http://icsharpcode.github.io/SharpZipLib/

using ICSharpCode.SharpZipLib.Zip;

 public static void BatchDownFile(List<string> urlList)
        {
            /*删除之前的临时文件*/
            string path = Path.Combine(privateDiskBasePath,"tempZip");
            DirectoryInfo dirInfo = new DirectoryInfo(path);
            if (dirInfo.Exists)
            {
                dirInfo.Delete(true);
            }
            dirInfo.Create();
            string fileName = Path.Combine(path, "打包文件.zip");
            using (ZipFile zip = ZipFile.Create(fileName))
            {
                zip.BeginUpdate();
                zip.SetComment("压缩包");

                foreach (var item in urlList)
                {
                    if (File.Exists(item))//判断是文件还是文件夹
                    {
                        byte[] buffer = null;
                        try
                        {

                            buffer = File.ReadAllBytes(item);
                        }
                        catch
                        {
                        }

                        if (buffer != null && buffer.Length > 0)
                        {
                            StreamDataSource dataSource = new StreamDataSource(buffer);
                            string[] fileNameSplit = item.Split('\');

                            zip.Add(dataSource, fileNameSplit[fileNameSplit.Length - 1]);
                        }
                    }
                }
                zip.CommitUpdate();
            }
            DownFile("打包文件.zip", fileName);
        }

 public class StreamDataSource : IStaticDataSource
    {
        public byte[] Buffer { get; private set; }
        public StreamDataSource(byte[] buffer)
        {
            Buffer = buffer;
        }
        public Stream GetSource()
        {
            return new MemoryStream(Buffer);
        }
    }

public static void BatchDownFile(List<string> urlList, int userId)
        {
            string privateDiskBasePath = string.Empty;
            /*删除之前的临时文件*/
            string path = Path.Combine(privateDiskBasePath, userId.ToString(), "tempZip");
            DirectoryInfo dirInfo = new DirectoryInfo(path);
            if (dirInfo.Exists)
            {
                dirInfo.Delete(true);
            }
            dirInfo.Create();
            string zipFileName = Path.Combine(path, "打包文件.zip");
            using (FileStream fs = File.Create(zipFileName))
            {
                using (ZipOutputStream zipStream = new ZipOutputStream(fs))
                {
                    foreach (var item in urlList)
                    {
                        using (FileStream toZipFs = new FileStream(item, FileMode.Open, FileAccess.Read))
                        {
                            string fileName = item.Substring(item.LastIndexOf("\") + 1);
                            ZipEntry zipEntry = new ZipEntry(fileName);
                            zipStream.PutNextEntry(zipEntry);
                            zipStream.SetLevel(5);//设置压缩等级

                            byte[] buffer = new byte[2048];

                            int sizeRead = 0;
                            try
                            {
                                do
                                {
                                    sizeRead = toZipFs.Read(buffer, 0, buffer.Length);
                                    zipStream.Write(buffer,0, sizeRead);
                                } while (sizeRead > 0);
                            }
                            catch (Exception)
                            {
                                throw;
                            }
                            toZipFs.Close();
                        }
                    }
                    zipStream.Finish();
                    zipStream.Close();
                }

                fs.Close();
            }

        }